Escapement-wheel.



P. E. JBANMAIRET. BSGAPBMBNT WHEEL.'

APPLICATION FILED JAN.24, 1912.

1,044,054, Patented'Nov. 12, 1912.

UNITED STATES. PATENT OFFICE.

-BAUL E. JEANMAIRET. or ELGIN, ILLiNoIs.

ESCAPEMENT-WHEEL.

To all whom 'it may concern; e 4

Be it k'nown that I, PAUL E. JEANMAIRET, a citizen of the -Uni'tedStates, residing at Elgin, in thecounty of Kane and State of Illinois,have invented certain new and usethe lubricant holding pockets may bereadily formed in the process of cutting the wheel.

The improvements also contemplate apeculiarlocation of the lubricantpockets in respect to the teeth of the wheel whereby the feeding of thelubricant t0 the pallet engaging portions ofthe' teeth by centrifugalaction is facilitated.

For a full understanding -of the present invention, reference is to behad to they fol-4 lowing description and to thel accompanying drawings,wherein Eigure 1 is a side v1ew showing an escapement wheel embodyingthe invention in op-V erative relation to a common form of pallet. Fig.2 is a view in side elevation of one of the teeth, a fragment of thewheel -body being shown and the partsbeing seen onan enlarged scale.Fig. 3 is an edgeview. of

the parts seen in Fig. 2. e

Throughout the following detail descrip-v tion and on the severalfigures ofthe draw'- ings, similar parts are referred to by likereference characters.

The escapement wheel illustrated in the drawings is of the ordinarytypein so fark as its general formation is concernedv and is-denotedat 1. The various-teeth 2 of the wheel are adapted to coperate with thepal-r .l

let 3 in the customary way, t-he latter Vbeing provided with the stones4.. In making. the

wheel 1, .itis contemplated to form the teeth l 2 slightly wider nearth'eir `outer ends than usual in 'order toreadily provide pockets" orrecesses 5in the curved edge portions of said teeth, arranged.transversely on the edges with respect to the diameter ofthe escapementwheel, that is, substantially parallel to Specification of LettersPatent. Application led January 24, 1912. Serial No. 673,09?.l

' the axis of the Wheel. yThe pockets 5 are of somewhat semi-circularform and are sutilciently deep that they will receive a drop oflubricating oil whenv the `latter is applied thereto, and the two edgesof each recess are parallel to each other, as shown. The saidpockets orrecesses 5'are arranged sub-l stantially .parallel to each other on thedif ferent teeth. The oil once received in va pocket '5' is fed to thehead or outer extreme vportion o-f the teethto reduce toa minimum thefriction between the stones 4 of the pallet and the wheel.

- As above noted, the lubricant pocketsk 5 Patented Nov. 12, 1912.

are 'arranged onthe curved side of the teeth l' and formed as close as;possible 'to the heads g of said teeth, this being advantageous in Orderthat the lubricant may freely flow-to the portions of the teeth wheremost needed. As a matter of'fact, a portion of the head of each tooth iscut out in forming the lubricant pocket 5. therein, as 'will be readilyobserved upon 'reference to the drawing, the pocket extendingtransversely the entire width ofthe face of the tooth in a directionparallel to the axis of the escapement wheel. The edge of thesubstantially semicircular channel or pocket which isfformed farthest.awayfrom theaxis `of .the Wheel is a slight distance inwardly from theouter "edge of the tooth inwhich the channel or pocket fis formed. f

In` the use ofthe invention, when the oil is applied to the ends of theteeth 2, it will drop into the pockets 5 and in the operationor motionof the escapement will feed to the stones 4: bycapillary action. j Asthe recesses, or pockets, 5 are disposed in substantial par'- allelismto the axis of the escapement wheel,

the centrifugal action' exercised by the rotation of the esca-pementwheel tends to throw. the oil contained in the pockets, or re cesses,toward the deepest portions thereof, these being the'portions oftherecesses which are located farthest'away from the axis, of

the wheel and somewhat inwardly 'from the edges of the recesses whicharenearestto the outer edges of the teeth. This action results in antwefoldadvantage., lfirstly, ithas a tendency-tohold theoil'in the pocketsk fora greater length. of time, as the throw is in the direction of the,"deepest portions of the pockets and not outwardly therefrom, as will be.obvious, but ythis tendency of the oil tocollectinfthe region ofgreatest depth of the pockets causes4 en exceedingly minute quantity ofthe oilv to be forced over the elly-es ot' the recesses which arefarthest from the axis ot the escapement Wheel and nearest to the outeredges ot the teeth, Which results in the feed to the outer edges beingexceedingly small. lThis fact. taken in connection` with the factthatthe recesses are disposed on the sides ot the teeth.\vl1ich are curved,by which provision the Contact between the straight edges of the stones4 and the said sides ot' the teeth is only very slight on account. ofthe curvature of the-latter, results in the second advantage that thefeed of-oil is excessively -minute and a quantity once placed in therecesses Will last a great length of time.

Havingl thus described the invention,\vl1at is claimed as new is:v

l. .Xs an article of manufacture, an escapement wheel comprising' a bodyand arms extending' outwardly therefrom, one of saidv arms having alubricant containing recess formed therethrough substantially parallelto the axis of the body, said recess being adjacent the outer end of the`arm iny position for delivering lubricant to the end of the arm.

2. As an-article of manufacture, an escapen ment Wheel comprising a bodyand arms extending outwardly therefrom, one of said ment Wheelcomprising a body, and arms extending; outwardly therefrom, each havingarecess extending transversely through the material of the respective armsubstantially parallel to the axis of the body, each of the recessesbeing adjacent the outer-"end of the respective arm in posit-ion fordelivering' lubricant from the respective recess to said outer end. 3

In testimony whereof I aliix my signature in presencel of two Witnesses.

' PAUL E. JEANMAIRET; Wi tnesses MARGUERITE A. Sonor/rz, A. H. SPRowLs.

Copies of this patent ma.;7 be obtained. for ve cents each, byaddressing the Commissioner of Patents,

, I `'tlashingtom D. G.

